Abstract
The effect of the herbicides MCPA and simazine on some physiological processes in bindweed was studied. An enhanced respiration rate in roots was demonstrated when MCPA was added to the nutrient solution, and when the plants were later transferred to a solution without any herbicide. When overground parts of plants were treated with the herbicide their respiration rate was found to proceed at a higher rate than in controls. the opposite situation being found to prevail in roots. In this experimental variant the content of glycides and of nitrogen in the overground parts was found to be reduced. It seems probable that the glycides were consumed due to the more intensive respiration caused by the presence of MCPA.
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